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Relevant bibliographies by topics / Enantioselectivity

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Academic literature on the topic 'Enantioselectivity'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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Journal articles on the topic "Enantioselectivity"

1

Ying, Xiangxian, Shihua Yu, Meijuan Huang, et al. "Engineering the Enantioselectivity of Yeast Old Yellow Enzyme OYE2y in Asymmetric Reduction of (E/Z)-Citral to (R)-Citronellal." Molecules 24, no. 6 (2019): 1057. http://dx.doi.org/10.3390/molecules24061057.

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The members of the Old Yellow Enzyme (OYE) family are capable of catalyzing the asymmetric reduction of (E/Z)-citral to (R)-citronellal—a key intermediate in the synthesis of L-menthol. The applications of OYE-mediated biotransformation are usually hampered by its insufficient enantioselectivity and low activity. Here, the (R)-enantioselectivity of Old Yellow Enzyme from Saccharomyces cerevisiae CICC1060 (OYE2y) was enhanced through protein engineering. The single mutations of OYE2y revealed that the sites R330 and P76 could act as the enantioselectivity switch of OYE2y. Site-saturation mutage

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Majewski, Marek, Ryszard Lazny, and Agnieszka Ulaczyk. "Enantioselective ring opening of tropinone. A new entry into tropane alkaloids." Canadian Journal of Chemistry 75, no. 6 (1997): 754–61. http://dx.doi.org/10.1139/v97-091.

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The lithium enolate of tropinone reacts with alkyl chloroformates to give 6-N-carboalkoxy-N-methyl-2-cycloheptenones (4). These compounds can be produced enantioselectively, in up to 95% ee, if chiral lithium amides (derived from optically pure amines 5–7) are used for deprotonation of tropinone in the presence of additives. The effect of additives such as LiCl, LiBr, LiF, LiClO4, CeCl3, ZnCl2, LiOH, TMEDA, HMPA, and DMPU on enantioselectivity of this deprotonation–ring opening sequence varies from slight to very large depending on the chiral amide – additive combination. Especially large incr

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3

Filippi, A., A. Giardini, S. Piccirillo, and M. Speranza. "Gas-phase enantioselectivity." International Journal of Mass Spectrometry 198, no. 3 (2000): 137–63. http://dx.doi.org/10.1016/s1387-3806(00)00196-2.

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Feng, Binbin, Xia Li, Lijun Jin, et al. "Engineering the Activity of Old Yellow Enzyme NemR-PS for Efficient Reduction of (E/Z)-Citral to (S)-Citronellol." Catalysts 12, no. 6 (2022): 631. http://dx.doi.org/10.3390/catal12060631.

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The cascade catalysis of old yellow enzyme, alcohol dehydrogenase and glucose dehydrogenase has become a promising approach for one pot, two-step reduction of (E/Z)-citral to (S)-citronellol, serving as a chiral alcohol with rose fragrance. During the multi-enzymatic cascade catalysis, old yellow enzyme is responsible for the reduction of the conjugated C=C and the introduction of the chiral center, requiring high activity and (S)-enantioselectiviy. Herein, to improve the activity of the old yellow enzyme from Providencia stuartii (NemR-PS) with strict (S)-enantioselectivity, the semi-rational

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Ragusa, Andrea, Joseph M. Hayes, Mark E. Light, and Jeremy D. Kilburn. "Predicting Enantioselectivity: Computation as an Efficient “Experimental” Tool for Probing Enantioselectivity." European Journal of Organic Chemistry 2006, no. 16 (2006): 3545–49. http://dx.doi.org/10.1002/ejoc.200600368.

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Nguyen, Zachary A., Dylan Boucher, and Shelley D. Minteer. "Electrolyte Induced Solvent Cage Effects for Enantioselective Electrosynthesis." ECS Meeting Abstracts MA2022-02, no. 53 (2022): 2514. http://dx.doi.org/10.1149/ma2022-02532514mtgabs.

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Electrochemistry provides a tunable, regioselective, and green alternative to traditional synthetic organic methods, and access to reactive intermediates. Problematically, electrochemical redox events often go through planar radical intermediates, thus destroying enantioselectivity. As such, researchers have sought the “chiral electron”, a general methodology to impart enantioselectivity to electroorganic reactions. One strategy has been asymmetric transition metal catalysis while replacing the typical stochiometric redox reagent needed with electricity, thus providing a chiral pathway for ele

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Reetz, Manfred T., Sheng Wu, Huabao Zheng, and Shreenath Prasad. "Directed evolution of enantioselective enzymes: An unceasing catalyst source for organic chemistry." Pure and Applied Chemistry 82, no. 8 (2010): 1575–84. http://dx.doi.org/10.1351/pac-con-09-09-16.

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Directed evolution has emerged as a powerful method for engineering essentially any catalytic parameter of enzymes for application in synthetic organic chemistry and biotechnology, including thermostability, substrate scope, and enantioselectivity. Enantioselectivity is especially crucial when applying biocatalysts to synthetic organic chemistry. This contribution focuses on recent methodology developments in laboratory evolution of stereoselective enzymes, hydrolases, and monooxygenases serving as the enzymes. Specifically, iterative saturation mutagenesis (ISM) has been developed as an unusu

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Wang, Tairan, Ran Wei, Yingting Feng, et al. "Engineering of Yeast Old Yellow Enzyme OYE3 Enables Its Capability Discriminating of (E)-Citral and (Z)-Citral." Molecules 26, no. 16 (2021): 5040. http://dx.doi.org/10.3390/molecules26165040.

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The importance of yeast old yellow enzymes is increasingly recognized for direct asymmetric reduction of (E/Z)-citral to (R)-citronellal. As one of the most performing old yellow enzymes, the enzyme OYE3 from Saccharomyces cerevisiae S288C exhibited complementary enantioselectivity for the reduction of (E)-citral and (Z)-citral, resulting in lower e.e. value of (R)-citronellal in the reduction of (E/Z)-citral. To develop a novel approach for the direct synthesis of enantio-pure (R)-citronellal from the reduction of (E/Z)-citral, the enzyme OYE3 was firstly modified by semi-rational design to i

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Cowan, Don A., and Helen D. Simpson. "Controlling the enantioselectivity of sec-alcohol dehydrogenase from thermoanaerobacterium sp. KET4BL." Protein & Peptide Letters 4, no. 1 (1997): 25–32. http://dx.doi.org/10.2174/092986650401221012141152.

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Abstract: The control of enantioselectivity by miscible organic solvents of a thermostable sec-ADH, purified from an anaerobic, thermophilic bacterium designated Therm.oanaerobacterium sp. Ket4B1, has been investigated. Experiments to compare the initial rates of oxidation of (R)-.and (S)-butan-2-ol in the presence of Oto 40% (v/v) acetonitrile revealed that the v0Rfv0s initial ratio increased with increasing solvent concentration. Other co-solvents were also found to influence the enantioselectivity but there was no direct correlation between either the log P or the dielectric constant of the

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Gan, Li, and Michael A. Brook. "Hydrosilylation of ketones catalyzed by C2-symmetric proline-derived complexes." Canadian Journal of Chemistry 84, no. 10 (2006): 1416–25. http://dx.doi.org/10.1139/v06-116.

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Extracoordinate chiral hydrosilanes were generated in situ from triethoxysilane and a C2-symmetric ligand derived from bisproline 7. In the presence of a catalytic amount of ligand 7, prochiral ketones were reduced in moderate yield with moderate enantioselectivity (up to 64% ee). Alternatively, TiF4 complexes of 7 were used to provide higher enantioselectivity and with improved yields. The copper complex of ligand 7 and 29Si NMR data provide some guidance as to the key factors responsible for the observed reactivity at the silicon and at the ligand centre.Key words: extracoordinate chiral sil

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Dissertations / Theses on the topic "Enantioselectivity"

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McDermott, Michael Cory. "Asymmetric Heck reaction : conformational effects and enantioselectivity." Thesis, University of East Anglia, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.426670.

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Onakunle, Ojo Adegboyega. "Studies on the enantioselectivity of bacterial lactonases." Thesis, University of Kent, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362189.

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Luo, Junfei. "Controlling regioselectivity and enantioselectivity in C-H activation." Thesis, Queen Mary, University of London, 2015. http://qmro.qmul.ac.uk/xmlui/handle/123456789/9550.

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The direct functionalisation of C-H bonds has emerged in recent years as an efficient and atom-economic alternative to the traditional cross coupling reaction. One of the challenges towards this goal is the selective transformation of a particular C-H bond amongst many other C-H bonds. This thesis describes studies on the use of CO2 as a traceless promoter for controlling meta-regioselective arylation of phenols and a separate investigation into an enantioselective arylation of pre-chiral η6-arene tricarbonyl chromium complexes. The introduction provides a general review of recent advances in

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Moa, Sara. "Quantum chemical modelling of enantioselectivity in alcohol dehydrogenase." Licentiate thesis, Stockholms universitet, Institutionen för organisk kemi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-142437.

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Biocatalytic methods of synthesis are becoming increasingly important in industry. Using enzymes as catalysts allows highly selective reactions to be performed under milder physical conditions and in a more environmentally benign fashion than most corresponding chemical catalysts. Enzymes have in general evolved to perform one type of reaction on a limited set of molecules, and hence there is often a need to alter the specificity of an enzyme to suit a desired process. Understanding the details of enzymatic catalysis at a quantum mechanical level enables the intelligent redesign of these macro

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Wood, Stephen A. "The analytical and biological enantioselectivity of substituted 2-aminotetralins." Thesis, University of Surrey, 1996. http://epubs.surrey.ac.uk/843160/.

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The enantiomeric discrimination properties of a number of commercial chiral HPLC stationary phases have been examined using a series of 2-aminotetralin analogues. The mobile phase conditions for each column were varied in order to optimise the separation for the largest number of analytes. Factorial experimental design techniques were used to test the empirically derived mobile phase combinations. A primary limitation of factorial design optimisation strategies, the number of experiments required, was overcome by the development of a simultaneous factorial design method utilising the selectivi

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Thurnhofer, Saskia. "Concentrations and enantioselectivity of anteiso-fatty acids in food." Aachen Shaker, 2007. http://d-nb.info/98772004X/04.

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Thurnhofer, Saskia. "Concentrations and enantioselectivity of anteiso-fatty acids in food /." Aachen : Shaker, 2008. http://d-nb.info/98772004X/04.

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Hyde, G. "Ab initio studies of weak force mediated molecular enantioselectivity." Thesis, University of Cambridge, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604912.

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This thesis project investigates two of the mechanisms that have been postulated to explain the origin of the molecular homochirality found in living systems. These mechanisms are i. the Yamagata-Rein Hypothesis, which predicts that the weak neutral currents between electrons and nucleons result in a Parity-Violating Energy Difference (PVED) between a pair of molecular enantiomers; and ii. the Vester-Ulbricht Hypothesis, which predicts that the β-particles produced during weak force mediated nuclear β-decay interact differently with each of a pair of molecular enantiomers. Both hypotheses pred

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Gillon, Karen A. "Scalemic Î² amino alcohols : their synthesis and use in asymmetric synthesis." Thesis, University of Strathclyde, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248481.

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Mezzetti, Alessandra. "Origins of pseudomonas cepacia lipase enantioselectivity towards chiral primary alcohols." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=84295.

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Pseudomonas cepacia lipase (PCL) is a highly enantioselective catalyst in the hydrolysis or formation of esters. It shows high enantioselectivity towards esters of chiral primary alcohols. Several scientists have tried to explain this enantioselectivity via modelling studies, however their results are in disagreement.<br>To explain PCL enantioselectivity towards chiral primary alcohols, we coupled structural studies and modelling of PCL-transition state analogue complexes containing pure enantiomers of chiral primary alcohols as alcohol moieties.<br>We first elucidate the different enan

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Books on the topic "Enantioselectivity"

1

Majumder, Abir B., and Kalluri V. S. Ranganath. Understanding Kinetic Resolution by Hydrolases: Maximizing Enantioselectivity. Springer, 2023.

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2

Wood, Stephen A. The analytica land biological enantioselectivity of substituted 2-aminotetralins. 1996.

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Book chapters on the topic "Enantioselectivity"

1

Uzir, Mohamad Hekarl. "Enantioselectivity." In Encyclopedia of Membranes. Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-44324-8_2068.

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Uzir, Mohamad Hekarl. "Enantioselectivity." In Encyclopedia of Membranes. Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-40872-4_2068-1.

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Uzir, Mohamad Hekarl. "Enantiomer Discrimination (Enantioselectivity)." In Encyclopedia of Membranes. Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-44324-8_2076.

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Uzir, Mohamad Hekarl. "Enantiomer Discrimination (Enantioselectivity)." In Encyclopedia of Membranes. Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-40872-4_2076-1.

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5

Pickenhagen, W. "Enantioselectivity in Odor Perception." In Flavor Chemistry. American Chemical Society, 1989. http://dx.doi.org/10.1021/bk-1989-0388.ch012.

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Majumder, Abir B., and Kalluri V. S. Ranganath. "Enantioselectivity: The Decisive Factors." In SpringerBriefs in Molecular Science. Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-46353-2_3.

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7

Soudijn, W., I. Van Wijngaarden, and A. P. Ijzerman. "Enantioselectivity in Drug-Receptor Interactions." In Stereochemical Aspects of Drug Action and Disposition. Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-55842-9_7.

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Kazlauskas, Romas. "Engineering Enantioselectivity in Enzyme-Catalyzed Reactions." In Protein Engineering Handbook. Wiley-VCH Verlag GmbH & Co. KGaA, 2011. http://dx.doi.org/10.1002/9783527634026.ch2.

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Gellman, Andrew J. "Enantioselectivity on Naturally Chiral Metal Surfaces." In Model Systems in Catalysis. Springer New York, 2009. http://dx.doi.org/10.1007/978-0-387-98049-2_4.

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Drăghici, Camelia, Elisabeta Chirila, and Mihaela Sica. "Enantioselectivity of Chiral Pesticides in the Environment." In Environmental Security Assessment and Management of Obsolete Pesticides in Southeast Europe. Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6461-3_7.

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Conference papers on the topic "Enantioselectivity"

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Zapata-Romero, Gilberto A., Markus Doerr, and Martha C. Daza. "Enantioselective lipase-catalyzed O-acylation of (RS)-propranolol: analysis of the hydrogen bonds essential for catalysis." In VIII Simpósio de Estrutura Eletrônica e Dinâmica Molecular. Universidade de Brasília, 2020. http://dx.doi.org/10.21826/viiiseedmol2020131.

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We investigated the effect of the acyl group size in the enantioselectivity of the acylation of propranolol, an amino alcohol used as β-adrenergic blocking agent. We applied a methodology frequently used to model enantioselectivity that is based on the hydrogen bonds present in the tetrahedral intermediate, which occurs in lipase-catalyzed reactions. We sampled the conformations of the tetrahedral intermediate corresponding to the esterification of both enantiomers of propranolol with ethanoyl and butanoyl, employing molecular dynamics simulation together with a quantum mechanics/molecular mec

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Fernandes, Carla, Fernando Remião, Barbara Silva, and Paula Pinho. "Synthetic cathinones: Chiral resolution and enantioselectivity studies." In 5th International Electronic Conference on Medicinal Chemistry. MDPI, 2019. http://dx.doi.org/10.3390/ecmc2019-06331.

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Musa, Musa M. "Effect of Substrate Structure on Enantioselectivity of Thermoanaerobacter ethanolicus Secondary Alcohol Dehydrogenase." In Annual International Conference on Chemistry, Chemical Engineering and Chemical Process (CCECP 2014). GSTF, 2014. http://dx.doi.org/10.5176/2301-3761_ccecp14.27.

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Gerrits, Pieter, Johannes Brussee, and Arne van der Gen. "Substrate Transport Limitation as tool to enhance enantioselectivity in the enzyme synthesis of chiral cyanohydrins." In The 3rd International Electronic Conference on Synthetic Organic Chemistry. MDPI, 1999. http://dx.doi.org/10.3390/ecsoc-3-01763.

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Roman, Diana, Bianca Boros, Mariana Matica, Constantina Vulpe, and Adriana Isvoran. "Effects of triazole fungicides on the soil health towards a sustainable agriculture." In Proceedings - 55th International October Conference on Mining and Metallurgy, Kladovo, 15-17 October 2024. Mining and Metallurgy Institute, Bor, 2024. https://doi.org/10.5937/ioc24007r.

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Within this study, the effects, produced by several triazole fungicides on soil microbiota and on activity of soil enzymes, are assessed taking into account the stereoisomeric nature of these pesticides. A combination of experimental and computational approaches was considered. The experimental method was used to assess the effect of different doses of triazole fungicides on soil health. The computational approach considered the molecular docking of the enantiomers of fungicides with enzymes. This study reveals that the effects of triazole fungicides on the soil health are dose dependent. The

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Silva, Barbara, Joana Saraiva Rodrigues, Joana Paiva Miranda, et al. "Metabolism of Cathinones in Functional Hepatocyte-like Cells Derived from Human Neonatal Mesenchymal Stem Cells: An Enantioselectivity Approach." In ECMC 2022. MDPI, 2022. http://dx.doi.org/10.3390/ecmc2022-13302.

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González-Díaz, Humberto, Eugenio Uriarte, Esther Lete, Nuria Sotomayor, and Sonia Arrasate. "QSRR prediction of Enantioselectivity Complex Networks related to the addition of organolithium reagents to imines in presence of chiral ligands." In The 13th International Electronic Conference on Synthetic Organic Chemistry. MDPI, 2009. http://dx.doi.org/10.3390/ecsoc-13-00239.

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Bhushan, Indu. "Efficient media for high production of microbial lipase from Bacillus subtilis (BSK-L) using response surface methodology for enantiopure synthesis of drug molecules." In 2nd International Scientific Conference "Plants and Microbes: the Future of Biotechnology". PLAMIC2020 Organizing committee, 2020. http://dx.doi.org/10.28983/plamic2020.044.

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Lipases are a multipurpose enzyme that holds a significant position in industrial applications due to its ability to catalyse a large number of reactions such as hydrolysis, esterification, interesterification, transesterification which makes it a potential candidate. It is also used for the separation of chiral drugs from the racemic mixture and this property of lipase is considered very important in pharmaceutical industries for the synthesis of enantiopure bioactive molecules. Assuming the tremendous importance of lipases, as stereoselective biocatalysts, in pharmaceuticals and various othe

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Pinto, Madalena, Carla Fernandes, Andreia Palmeira, et al. "Chiral Derivatives of Xanthones: Investigation of Enantioselectivity as Inhibitors of Cyclooxygenases (COX-1 and COX-2) and Binding Interaction with Human Serum Albumin." In 2nd International Electronic Conference on Medicinal Chemistry. MDPI, 2016. http://dx.doi.org/10.3390/ecmc-2-a023.

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